722427237 has 36 divisors (see below), whose sum is σ = 1217726796. Its totient is φ = 411505920.

The previous prime is 722427229. The next prime is 722427283. The reversal of 722427237 is 732724227.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 453434436 + 268992801 = 21294^2 + 16401^2 .

It is not a de Polignac number, because 722427237 - 2³ = 722427229 is a prime.

It is a super-2 number, since 2×722427237² = 1043802225518908338, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (722427227) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 146187 + ... + 151047.

Almost surely, 2^722427237 is an apocalyptic number.

It is an amenable number.

722427237 is a deficient number, since it is larger than the sum of its proper divisors (495299559).

722427237 is a wasteful number, since it uses less digits than its factorization.

722427237 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5218 (or 5208 counting only the distinct ones).

The product of its digits is 65856, while the sum is 36.

The square root of 722427237 is about 26878.0065667080. The cubic root of 722427237 is about 897.2869892242.

The spelling of 722427237 in words is "seven hundred twenty-two million, four hundred twenty-seven thousand, two hundred thirty-seven".